EP1888474A1 - Dentalglaskeramiken - Google Patents
DentalglaskeramikenInfo
- Publication number
- EP1888474A1 EP1888474A1 EP06763405A EP06763405A EP1888474A1 EP 1888474 A1 EP1888474 A1 EP 1888474A1 EP 06763405 A EP06763405 A EP 06763405A EP 06763405 A EP06763405 A EP 06763405A EP 1888474 A1 EP1888474 A1 EP 1888474A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- glass
- dental
- glass ceramic
- ceramic according
- ceramics
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002241 glass-ceramic Substances 0.000 title claims abstract description 114
- 239000013078 crystal Substances 0.000 claims abstract description 54
- UXBZSSBXGPYSIL-UHFFFAOYSA-N phosphoric acid;yttrium(3+) Chemical compound [Y+3].OP(O)(O)=O UXBZSSBXGPYSIL-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910000164 yttrium(III) phosphate Inorganic materials 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 14
- IKNAJTLCCWPIQD-UHFFFAOYSA-K cerium(3+);lanthanum(3+);neodymium(3+);oxygen(2-);phosphate Chemical compound [O-2].[La+3].[Ce+3].[Nd+3].[O-]P([O-])([O-])=O IKNAJTLCCWPIQD-UHFFFAOYSA-K 0.000 claims abstract description 9
- 229910052590 monazite Inorganic materials 0.000 claims abstract description 9
- 239000011521 glass Substances 0.000 claims description 57
- 239000000919 ceramic Substances 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 13
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 239000008187 granular material Substances 0.000 claims description 9
- 229910052907 leucite Inorganic materials 0.000 claims description 8
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 claims description 8
- 238000007669 thermal treatment Methods 0.000 claims description 8
- 229910052586 apatite Inorganic materials 0.000 claims description 7
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 6
- 150000002500 ions Chemical class 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 239000005548 dental material Substances 0.000 claims description 5
- 239000000156 glass melt Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 229910021193 La 2 O 3 Inorganic materials 0.000 claims description 3
- 229910018068 Li 2 O Inorganic materials 0.000 claims description 3
- 229910052910 alkali metal silicate Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 2
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 claims description 2
- 229910052912 lithium silicate Inorganic materials 0.000 claims description 2
- 238000009766 low-temperature sintering Methods 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 239000011022 opal Substances 0.000 claims description 2
- 230000000737 periodic effect Effects 0.000 claims description 2
- 239000005360 phosphosilicate glass Substances 0.000 claims description 2
- URRMBQZQLOMKID-UHFFFAOYSA-N potassium zinc hydroxy(trioxido)silane Chemical compound [Si]([O-])([O-])([O-])O.[Zn+2].[K+] URRMBQZQLOMKID-UHFFFAOYSA-N 0.000 claims description 2
- 239000005368 silicate glass Substances 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims 2
- 230000008018 melting Effects 0.000 claims 2
- 238000002156 mixing Methods 0.000 claims 2
- 238000004040 coloring Methods 0.000 claims 1
- 239000010437 gem Substances 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 9
- 239000000047 product Substances 0.000 description 8
- 238000002425 crystallisation Methods 0.000 description 7
- 230000008025 crystallization Effects 0.000 description 7
- 229910001751 gemstone Inorganic materials 0.000 description 6
- 239000000155 melt Substances 0.000 description 5
- 229910019142 PO4 Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- VVPKMGWILYHAOG-UHFFFAOYSA-K cerium;lanthanum;phosphate;hydrate Chemical compound O.[La].[Ce].[O-]P([O-])([O-])=O VVPKMGWILYHAOG-UHFFFAOYSA-K 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 229910052587 fluorapatite Inorganic materials 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000010899 nucleation Methods 0.000 description 3
- 230000006911 nucleation Effects 0.000 description 3
- 235000021317 phosphate Nutrition 0.000 description 3
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 150000002222 fluorine compounds Chemical class 0.000 description 2
- 239000006060 molten glass Substances 0.000 description 2
- -1 oxides Chemical class 0.000 description 2
- GMVPRGQOIOIIMI-DODZYUBVSA-N 7-[(1R,2R,3R)-3-hydroxy-2-[(3S)-3-hydroxyoct-1-enyl]-5-oxocyclopentyl]heptanoic acid Chemical compound CCCCC[C@H](O)C=C[C@H]1[C@H](O)CC(=O)[C@@H]1CCCCCCC(O)=O GMVPRGQOIOIIMI-DODZYUBVSA-N 0.000 description 1
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 229910004283 SiO 4 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- PGZIKUPSQINGKT-UHFFFAOYSA-N dialuminum;dioxido(oxo)silane Chemical compound [Al+3].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O PGZIKUPSQINGKT-UHFFFAOYSA-N 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052634 enstatite Inorganic materials 0.000 description 1
- 229940077441 fluorapatite Drugs 0.000 description 1
- 239000006124 glass-ceramic system Substances 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 229910052588 hydroxylapatite Inorganic materials 0.000 description 1
- BBCCCLINBSELLX-UHFFFAOYSA-N magnesium;dihydroxy(oxo)silane Chemical compound [Mg+2].O[Si](O)=O BBCCCLINBSELLX-UHFFFAOYSA-N 0.000 description 1
- 230000010494 opalescence Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 101150084116 rpo4 gene Proteins 0.000 description 1
- 239000006017 silicate glass-ceramic Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
- C03C10/0036—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and a divalent metal oxide as main constituents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/20—Protective coatings for natural or artificial teeth, e.g. sealings, dye coatings or varnish
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/70—Preparations for dentistry comprising inorganic additives
- A61K6/78—Pigments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/802—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
- A61K6/807—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising magnesium oxide
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/802—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
- A61K6/816—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising titanium oxide
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/802—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
- A61K6/818—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/802—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
- A61K6/822—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising rare earth metal oxides
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/802—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
- A61K6/827—Leucite
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/831—Preparations for artificial teeth, for filling teeth or for capping teeth comprising non-metallic elements or compounds thereof, e.g. carbon
- A61K6/833—Glass-ceramic composites
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/831—Preparations for artificial teeth, for filling teeth or for capping teeth comprising non-metallic elements or compounds thereof, e.g. carbon
- A61K6/838—Phosphorus compounds, e.g. apatite
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B32/00—Thermal after-treatment of glass products not provided for in groups C03B19/00, C03B25/00 - C03B31/00 or C03B37/00, e.g. crystallisation, eliminating gas inclusions or other impurities; Hot-pressing vitrified, non-porous, shaped glass products
- C03B32/02—Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C4/00—Compositions for glass with special properties
- C03C4/0007—Compositions for glass with special properties for biologically-compatible glass
- C03C4/0021—Compositions for glass with special properties for biologically-compatible glass for dental use
Definitions
- the invention relates to dental glass ceramics and a process for their preparation and their use.
- glass ceramics for industrial applications and for dental glass ceramics are characterized by a structure which contains one or more crystal phases or one or more glass phases.
- a known method for producing such a structure is the controlled crystallization of starting glasses by controlling the nucleation and crystallization processes in the particular starting glass.
- starting glasses W. Höland, G. H. Beall, Glass-ceramic technology 2002, The American Ceramic Society, Westerville, OH, USA.
- the optical properties have a special significance.
- the outstanding feature of gemstones and gemstones is also their optical brilliance.
- the xenotime crystal, YPO 4 also has gemstone character.
- Products with xenotime crystals are known from the prior art (J. Am. Ceram., Soc., 81, 1998, 2216-2218). Such products are used, for example, in medicine for tumor treatment (Kawashita et al: Biomaterials 24 (2003) Issue 17, 2955 to 2963).
- Use in the art as ceramic composites is known from US 5,948,516.
- xenotime-containing glass ceramics are described as products with a high modulus of elasticity. These products are low-SiO 2 and AbO 2 -rich glass ceramics for technical applications. With regard to the optical properties of this prior art contains no statements. The same applies to DE 103 46 197 A1.
- the object of the present invention is to provide a dental glass ceramic which has improved optical properties compared with the prior art and can be used in particular for materials for restorative dentistry.
- the aim is to achieve a light transmission (light transmission), light scattering and diffraction, which corresponds to that of natural teeth.
- dental glass ceramics are to be made available, which can be used as special components for veneering materials with high optical aesthetics. This should make it possible to provide veneers.
- the dental glass-ceramic as the main crystal phase contains precious and / or gemstones, preferably xenotime-type or monazite-type crystals or mixtures thereof, or their mixed crystals or their related crystals, e.g. that contains the rhabdophane type.
- Xenotim and / or monazite crystals or crystals of xenotime and / or monazite types such as YPO 4 , ErPO 4 , YbPO 4 , LuPO 4 , LaPO 4 , CePO 4 , DyPO 4 , GdPO 4 are preferably used in the glass ceramics according to the invention or TbPO 4 formed.
- their mineralogical relatives such as of the rhabdophane and / or Weinschenkit type such as RPO 4 * (0.5-1) Z or RPO4 * 2Z can be used, where R is a rare earth element, such as Y, Er or Dy and Z in minerals is preferably H2O.
- the formation of xenotime or related phases is preferred. That is, according to the present invention, the main crystal phase contains YPO 4 or consists of this compound. Also, mixtures of one or more of the aforementioned other xenotime-type, monazite-type crystals, their mixed crystals, or related crystals such as those of the rhabdophane type may be formed according to the present invention. Further details on the xenotimines and monazites are contained in the following references, for example: Ushakov, SV, Helean, KB and Navrotsky, A. "Thermochemistry of rare-earth orthophosphates, Journal Mater. Res., Vol. 16, no.
- the main crystal phase can be produced by controlled volume nucleation and crystallization in the starting glass, so that the crystals grow individually and in volume in a statistically distributed manner and their size is in the range from 0.1 to 10 ⁇ m, preferably from 0.1 to 2 ⁇ m. is controllable.
- the control of the processes of crystal growth is caused by two main effects: the choice of the composition and the subsequent heat treatment of the melted starting glasses. Both temperature and time play important roles here.
- a special feature of the heat treatment is that in addition to the single-stage and multi-stage thermal treatments lead to crystallization.
- a special case is such a molten glass that is supersaturated in ions and substance groups for the crystals in such a way that it already forms crystals on cooling, ie without an additional heat treatment. This crystallization proceeds spontaneously, ie not controlled, the crystal size is not controllable. A control is only possible by an additional thermal treatment.
- further secondary crystal phases may also be present in the dental glass ceramic.
- secondary crystal phases starting from the composition of the starting glasses, in particular apatite or leucite are suitable.
- the advantageous properties in particular the optical properties, such as translucency with controllable opalescence and thermal properties, such as variable sintering temperatures, which are caused by the main crystal phase of xenotime crystals, also remain in a mixed glass ceramic structure with the described secondary crystal phases.
- the mixed crystal ceramics described are also compatible with other dental glass ceramics, e.g. Leucite dental glass ceramics or leucite apatite
- Dental glass-ceramics This opens up further possibilities for applying the inventions Dental glass ceramics according to the invention for the production of sintered glass ceramics with leucite and / or l_eucit apatite glass ceramic systems.
- the other glasses are preferably selected from the group of opal glasses, alkali silicate glasses and / or low-temperature sintering potassium-zinc-silicate glasses and the other glass ceramics, preferably selected from the group of the deep-sintering apatite glass ceramics, the translucent apatite ceramics, the sinterable Lithium silicate glass ceramics, the ZrO 2-SiO 2 glass ceramics and / or the leucite-containing phosphosilicate glass ceramics.
- the xenotime-type glass ceramics according to the invention can be mixed with other glasses and / or glass ceramics.
- the xenotime glass-ceramic forms the main component in, for example, an inorganic composite.
- the glass ceramics according to the invention can be combined with a large number of other glass ceramics in order to achieve the setting of specific optical, mechanical or thermal properties.
- Such glasses or glass ceramics can be found, for example, in DE 43 14 817 A1, DE 44 23 793 A1, DE 44 23 794 A1, DE 44 28 839 A1, DE 196 47 739 A1, DE 197 25 552 A1 and DE 100 31 431.A1
- Such glasses and glass-ceramics are preferably derived from silicates, borates or phosphates or aluminate-silicate systems.
- Preferred glass ceramics are derived from the following material systems: SiO 2 -Al 2 O 3 -K 2 O with cubic or tetragonal leucite crystals, SiO 2 -O 2 O 3 -Na 2 O, alkali silicates, alkali-zinc silicates, silico-phosphate systems n and / or the SiO 2 -ZrO 2 basic system.
- the thermal expansion coefficient of the resulting mixed glass ceramics in a range of 7 to 20 * 10 - 6 K- 1 , measured in Bererich of 100 to 400 0 C, set become.
- the dental glass ceramic according to the invention may also contain one or more color-forming or fluorescence-forming metal oxides.
- the dental glass ceramic according to the invention contains as main components SiO 2 , Al 2 O 3 , Y 2 O 3 and P 2 Os.
- alkali metal oxides in particular Na 2 O or K 2 O, into consideration.
- composition of the dental glass-ceramic according to the invention with xenotime and / or monazite crystals and / or crystals of xenotime or monazite type crystals is e.g. following are considered:
- R-oxides are selected from the group Y 2 O 3 , CeO 2 , La 2 O 3 , Tb 4 O 7 , Er 2 O 3 and / or Lu 2 O 3 .
- the sum of the components contained in the glass or the glass ceramic is always 100% by mass.
- the mole ratio of P 2 O 5 to Y 2 O 3 should preferably be in the range of 1: 0.5 to 1: 3.5.
- the molar ratios are given in Table 1 below.
- Z in minerals is preferably H2O, it means foreign ions or lattice defects in synthetic glasses and glass ceramics.
- the described dental glass ceramics according to the invention in their various compositions are characterized by excellent translucent properties with a controlled turbidity, without a completely white-opaque body without any translucency (corresponding to a turbidity of 1, 0) is formed.
- the degree of turbidity, measured according to the dental standard BS 5612, should be less than or equal to 0.8, and is preferably in the range of 0.40 to 0.78.
- the dental glass ceramics have good processing properties. Since they can also be mixed with other glass ceramics, they can preferably be used in restorative dentistry, in particular as a sinterable veneering material.
- the good chemical resistance of the dental glass ceramics according to the invention is also advantageous. This is manifested in particular in an excellent acid resistance, which is preferably less than 100 ⁇ g / cm 2 mass loss.
- the dental glass-ceramics according to the invention can be produced by customary methods known from the prior art. For example, the method according to DE 197 50 794 A1 can be used for the dental glass ceramics according to the invention. In this case, a melt of the starting glass is shaped and cooled in the desired manner. The molded glass product is subjected to a heat treatment to obtain a greenware shaped glass ceramic product. This manufacturing process provides so-called monolithic bodies.
- the production can be carried out by means of the so-called solid glass / glass-ceramic technology:
- step (a) a melt of a starting glass containing the components of the glass-ceramic is produced.
- a suitable mixture of suitable starting materials such as carbonates, oxides, fluorides and phosphates, prepared and heated to temperatures of preferably 1300 to 1600 0 C for 2 to 10 hours.
- the obtained glass melt can be poured into water to form glass grains and the resulting glass grains are remelted.
- step (b) the melt of the starting glass is shaped into a corresponding shape, e.g. cast a steel mold and cooled to room temperature to obtain a glass product such as e.g. to get a glass blank.
- step (c) is subjected to nucleation and crystallization of the glass blank of a single or multi-stage thermal treatment in the temperature range of 700 0 C to 1200 0 C for a period of 30 minutes to about 6 hours.
- Preferred for these thermal treatments are temperatures in the range of 700 0 C to about 1000 0 C and times of one to four hours.
- the cooling is preferably carried out in a controlled manner to allow for relaxation of the glass and to avoid stresses in the structure associated with rapid temperature changes.
- the melt is poured into preheated to eg 400 0 C forms.
- the glass blank can then be slowly cooled to room temperature in an oven.
- powders can be produced.
- the following procedure can be used to produce the xenotime-type glass-ceramic according to the invention:
- step a) first the required individual components, e.g. Carbonates, oxides, fluorides and phosphates homogeneously mixed together and heated to the temperatures indicated. This forms the desired starting glass.
- individual components e.g. Carbonates, oxides, fluorides and phosphates homogeneously mixed together and heated to the temperatures indicated. This forms the desired starting glass.
- stage b the obtained glass melt is quenched by pouring into water. It forms a glass granules. This manufacturing step is commonly referred to as frits.
- step c) the glass granules are subsequently comminuted and ground mainly with conventional mills to a preferred particle size.
- the glass powder thus produced then has a desired average particle size of 1 to 500 microns, based on the number of particles.
- step d) the glass granules or optionally the glass powder is subjected to a thermal treatment at temperatures of 700 to 1200 0 C (one or more stages) for a period of 30 minutes to 6 hours, preferably 30 minutes to 3 hours.
- the crystals produced in sintering step d) have a comparatively small size of about 0.1 to max. 10 ⁇ m, preferably between 0.1 and about 2 ⁇ m.
- the crystals are statistically distributed in the glass ceramic and no preferred crystal growth sites are observed.
- dental glass ceramic in powder form with further dental glass ceramic powders.
- suitable dental glass ceramics include leucite or leucite-fluoroapatite. As a result, a dental mixed glass ceramic is obtained in the end product.
- the advantages of the dental glass ceramic according to the invention are particularly evident, which manifest themselves in particular in the outstanding processing properties of the xenotime-containing dental glass powder. These advantages can be seen especially in the sinterability in a wide temperature range while maintaining the optical properties.
- the dental glass ceramics according to the invention can be used in the manner described above, in particular for the production of mixed glass ceramics, in particular as a sinterable veneering material for metallic or ceramic frameworks.
- glass-ceramic pressing technology for example Empress® technology from Ivoclar Vivadent AG
- the monolithic body can be processed by machining (e.g., CAD / CAM) to form a body for use as a dental restoration.
- the dental glass ceramics according to the invention can also be used as turbidity component, dental material or any dental restorations.
- the dental material can be used as a coating material or veneering material.
- the dental restorations may be a crown, a bridge, a partial crown, an onlay, an inlay, an artificial tooth, a stump structure or a facet.
- the coating material can be used to coat metallic or / or ceramic frameworks.
- Table 2 Compositions and crystal phases of glass ceramics according to the invention
- Examples 1-5 represent xenotime-type glass-ceramics.
- Example 6 represents xenotime, the glass is supersaturated and the crystallization occurs spontaneously already upon cooling of the melt.
- the main crystal phase is a xenotime type of the formula YPO 4 * 0.8 Z.
- This crystal phase was prepared according to the JCPDS 42-0082 reference (Literature: JACTAW, volume 72, page 1073, (1989) primary reference: Hikichi, Y., Sasaki, T., Murayama, K., Nomura, T., Miyamoto, M.).
- This crystal phase was shown under this reference as the hydrate phase YPO 4 0.8 H 2 O and could, according to Hikichi et al. (1989) can also be referred to as Rabdophan type.
- Example 2 fluoroapatite was formed as a minor phase.
- Example 9 shows the glass-ceramics with xenotime-type crystals which have been incorporated into the crystal structure of nations and correspond to the formula Na 3 .eYi . ⁇ (PO 4 ) 3 .
- Examples 11 to 13 show the glass ceramics with monazite-type crystals LaPO 4 and TbPO 4 wherein in Example 12, a secondary phase of the type NaYg (SiO 4 ) 6 ⁇ 2 was detected.
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Plastic & Reconstructive Surgery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Glass Compositions (AREA)
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Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005026269A DE102005026269A1 (de) | 2005-06-08 | 2005-06-08 | Dentalglaskeramiken |
| PCT/EP2006/062761 WO2006131473A1 (de) | 2005-06-08 | 2006-05-31 | Dentalglaskeramiken |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1888474A1 true EP1888474A1 (de) | 2008-02-20 |
| EP1888474B1 EP1888474B1 (de) | 2011-04-06 |
Family
ID=36942502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06763405A Not-in-force EP1888474B1 (de) | 2005-06-08 | 2006-05-31 | Dentalglaskeramiken |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7846857B2 (de) |
| EP (1) | EP1888474B1 (de) |
| JP (1) | JP2008541968A (de) |
| AT (1) | ATE504550T1 (de) |
| DE (2) | DE102005026269A1 (de) |
| WO (1) | WO2006131473A1 (de) |
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- 2005-06-08 DE DE102005026269A patent/DE102005026269A1/de not_active Withdrawn
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2006
- 2006-05-31 AT AT06763405T patent/ATE504550T1/de active
- 2006-05-31 JP JP2008515189A patent/JP2008541968A/ja active Pending
- 2006-05-31 WO PCT/EP2006/062761 patent/WO2006131473A1/de not_active Ceased
- 2006-05-31 EP EP06763405A patent/EP1888474B1/de not_active Not-in-force
- 2006-05-31 DE DE502006009257T patent/DE502006009257D1/de active Active
- 2006-05-31 US US11/921,816 patent/US7846857B2/en active Active
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| CN114127024B (zh) * | 2019-05-16 | 2023-10-24 | 康宁股份有限公司 | 具有蒸汽处理雾度抗性的玻璃组合物及其方法 |
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| CN114127024A (zh) * | 2019-05-16 | 2022-03-01 | 康宁股份有限公司 | 具有蒸汽处理雾度抗性的玻璃组合物及其方法 |
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| US11339084B2 (en) | 2020-05-12 | 2022-05-24 | Corning Incorporated | Fusion formable and steam strengthenable glass compositions with platinum compatibility |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006131473A1 (de) | 2006-12-14 |
| US20090023574A1 (en) | 2009-01-22 |
| ATE504550T1 (de) | 2011-04-15 |
| DE102005026269A1 (de) | 2006-12-14 |
| DE502006009257D1 (de) | 2011-05-19 |
| EP1888474B1 (de) | 2011-04-06 |
| JP2008541968A (ja) | 2008-11-27 |
| US7846857B2 (en) | 2010-12-07 |
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